云南龙胆种子萌发特性研究

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1、云南龙胆种子萌发特性研究摘要：?文以云南龙胆（Gentianayunnanensis）种子为试验材料，经赤霉素、氯化钙、硝酸钾的不同浓度处理，用不同温度浸种，置不同光照下培养，研宄其萌发特性。结果表明：云南龙胆种子经室温培养10d即可萌发；在不同浸种温度下萌发率相差不显著。蒸馏水室温浸种，24h/d光照培养萌发率为50%，自然光照培养萌发率为60%，黑暗条件培养萌发率为14.00%,光照与黑暗培养萌发指标差异显著（P〈0.05）。3种试剂浸种，萌发率最高的为300mg/L赤霉素处理，萌发率为82%，其次为0.2%氯化钙处理，萌发率为72%，1.5%硝酸钾浸种萌发率为70%，对照萌

2、发率为60%o试剂处理，自然光照室温培养20d至种子不再萌发为止测其根长，根长最长为硝酸钾浸种，为7.38±0.62mm，其次为氯化餌浸种，为6.83±0.96mm，最短为赤霉素浸种，为5.94±0.90腿，对照为5.34±2.02腿。试剂处理与对照差异不显著（P〉0.05）。光能促进云南龙胆种子萌发，试剂处理不仅能提高云南龙胆种子萌发率，而且能促进胚根与胚轴的伸长。本文采集自网络，本站发布的论文均是优质论文，供学和研宄使用，文中立场与本网站无关，版权和著作权归原作者所有，如有不愿意被转载的情况，请通知我们删除匕转载的信息，如果需要分享，请保留本段说明。关键词：云南龙胆；种子萌发

3、；氯化钙；赤霉素；硝酸钾中图分类号S567.239文献标识码A文章编号1007-7731(2017)10-0029-05Abstract：Inthisstudy,seedsofGentianayunnanensiswereusedasexperimentalmaterial，differentconcentrationsofgibberellin,calciumchlorideandpotassiumnitrate,differenttemperaturelevelsforsoakingseedsanddifferentlightconditionswereselectedtot

4、reattheseeds.Theresultsshowedthat10dayscultivationatroomtemperaturewasenoughfortheseedofGentianayunnanensistogerminatewhiletherewasnosignificantdifferenceforseedgerminationrateunderdifferentlevelsofsoakingtemperature.Thegerminationrateofseedsoakedindistilledwateratroomtemperatureand24h/dlight

5、conditionwas50%while60%inthenaturallightconditionsand14%inthedarklightconditions.Therewasasignificantdifferenceforseedgerminationratebetweendarkandlightconditions(P<0.05).Thehighestseedgerminationrateamongdifferentconcentrationsofreagentswas82%whichtreatedin300mg/Lgibberellinsolution,followin

6、gwas72%whichtreatedin0.2%calciumsolutionandthelastwas60%whichtreatedin1.5%potassiumsolutionwhile60%fortheCK.Aftertreatedwithdifferenttypesofreagents,rootlengthweremeasureduntiltheseedswerenolongertocontinuegerminateafter20dayscultivationatroomtemperatureandnaturallightcondition.Theresultsshow

7、edthatthelengthoflongestrootwas7.38+0.62mmwhichseedsweretreatedinpotassiumsolution,followingwas6.83+0.96mmwhichseedsweretreatedincalciumandthelastwas5.94±0.90minwhichseedsweretreatedingibberellinsolutionwhile5.34±2.02mmfortheCK.Therewasnosign